JPS6014125B2 - Roving stop device of spinning machine draft device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION During yarn breakage, the top roller is moved from the bottom roller by the clamping part between the pair of rollers placed in front of the apron unit, and the roving is moved between itself and the top roller. This stop and its opening/closing device are placed on a support rail extending parallel to the roving, and are assigned to the top arm that holds the double top roller. A roving stop device of a known spinning machine draft device (German Patent Publication No. 3145
7), the pivot mounting of each support rail includes a spring and a stop device.

The support rail is held by this spring in a defined working position via a stop and can be pivoted against the force of the spring into a defined non-working position via a stop. In order to be able to pivot at the same time one of the support rails attached to the top arm, a connecting hanger is fixed on the top arm. It has a gripping device that holds and wraps it. The clearance or play in the operating position of the top arm and support rail in the pivoting direction and in the lateral direction is such that no forces are exerted on the support rail from the top arm and the connecting hanger that affect the operating position of the support rail. This play is also relevant if the pivot axis of the support rail is not coaxial, but is offset laterally to the pivot axis of the top arm. That is, if the pivot axes are misaligned, the support rail can be displaced without hindrance in the gripping device that loosely envelops the support rail during the pivoting of the top arm and the support rail. Overall, however, this pivot mounting and top arm coupling device, including both pivot positioning devices for the support rail, is relatively expensive. Additionally, it is difficult to place the roving to be pulled on the bottom roller when the top arm is in the non-operating position but the support rail is in the operating position due to the stop. This is because the arm of the gripping device protrudes into the insertion path. The invention is based on the objective of simplifying the pivoting mounting for the support rail while maintaining a secure operating position.

This problem is solved by the configuration described as a feature in claim 1.

As a result, the support rail only needs to be supported by simple pivot bearings. This is because the support rail is kept in the operating position via the elastic stamp from the top arm. The links connecting the support rails to each other are located at locations that do not interfere with the usual insertion of the roving into the drafting device. It is possible to arrange spring-loaded parts both on the top arm and on the tether link, which compensate for the assignment tolerances of the top arm and the support rail and hold the support rail in its operating position with the minimum force that can be determined. Instead of using special compression springs, the stamp or support may itself be a component made of elastic material. In the simplest embodiment, the support can have a flat surface on which the stamp rests with a flat or rounded surface formed thereon. Even when applying the invention to a top arm with partial unloading, the support rail in the component loading position is still reliably kept in the operating position by the effective spring force. With partial unloading, the vertical joint between the top roller and the bottom roller is unloaded during long machine stops. Claim 3 shows an advantageous arrangement which prevents loss of the compression spring.

The support stamp for the locking joint according to claim 4 has the advantage that simultaneously with the pivoting of the top arm, the support rail can optionally also be pivoted.

The link connecting the two supporting rails to each other can be of any design, for example simple birch.

The arrangement of the connecting links on the support rails as defined in claim 5 is particularly advantageous, since it makes it possible to easily connect support rails arranged side by side at the respective machine pitch intervals to one another. It is. According to claim 6, the tether link is a component that simultaneously grasps the fiber tufts produced in that area after the roving has stopped from below, supports it, and ensures that the lees enter into the apron unit when advancing. This brings about the advantage.

If, as indicated in patent claim 7, the table is also assigned a holding part, a firm holding of the resulting fiber tufts even occurs. The present invention will be explained below with reference to illustrated embodiments.

As can be seen in FIG. 1, a support body 2 is fixed on a support shaft 1 fixed to a machine, and a top arm 4 of a double top roller is rotatably held on this support body 2 by a bearing 3.

The arm 4 is shown in a running state, and in that state the double top rollers 5', 6', 7' carried by the arm 4 are
, 8' rest on the driven bottom rollers 5, 6, 7, 8. A top apron 9 runs over the roller 7' and a cage (not shown), and a bottom apron 11 runs over the roller 7 and a mechanically fixed tension bar 10 placed in front of it.
runs. A roving stopping device for stopping the roving 12 running past the drafting device in the direction of arrow A is arranged on a support rail 13 fixed to a support plate 14, which supports the bearing 1.
5 rests pivotably on a retaining plate 16.

The retaining plate 16 is held by a clamp 17 so that the bearings 15 of the pair of mutually connected support rails 13 are coaxial.
It is fixed on the support shaft 1. The support rail 13 has a U-shaped cross-section as shown in FIG.

A slider 18 is guided inside the slider so as to be movable in the longitudinal direction. One end of the slider 18 enters a case 19 fixed on the support plate 14, and an electromagnet 20 is placed inside the case 19. The excitation village 21 and the opening 22 are assigned to the stopper 23 of the slider 18. The slider 18 is subjected to the force of a compression spring 24 supported within the case 19. Electromagnet is plug 2
5 electrically connected to a yarn monitoring device, which is assigned to the fibers coming out of the drafting device and emits an excitation signal to the electromagnet 20' when the fibers break. Then, the lever 212 releases the stopper 23, so that the slider 8 is moved to the left in FIG. 1 by the compression spring 24. The two identical clamp units 26, which lie longitudinally movably on the support rail 13 and engage with the teeth 28 of the slider 18 with their connecting teeth 27, are then moved in unison. A tower 29 formed in the clamp unit 26 that grips the roving yarn 12 from below is connected to a pair of upper and lower rollers 5, 6'.
6 and 6', remove each top roller from the bottom roller while being supported on the bottom roller, and insert the roving 12 between itself and the top roller, which is stationary at that time. Tighten, thus stopping the advance of the roving. A fiber tuft is formed between the pair of rollers 6, 6' and the pair of rollers 7, 7' that precede it. This stop prevents fiber loss and ball formation at the draft device rollers in the event of yarn breakage. To resume operation, grasp the knob 30 on the clamp unit 26 and return it to the standby position shown. Each top arm 4 is assigned two support rails 13, as can be seen in particular in FIG.

In order to ensure that the support rail 13, which is held only in a simple swivel bearing 15, is held in the operating position, the two support rails 13 are connected to each other, the tether link 42 has a support and the top arm 4 The associated stamp is placed under the load of a compression spring. therefore,
A spring force is applied from the normally open top arm 4 in its operating position to the link and thus to both support rails 13, which spring force holds the support rail 13 firmly in its operating position determined by the stop. The stop occurs because the stop link 31 connected to the support rail 13 rests on the tensile bar 10 which is fixed to the machine. The stop link 31 is attached to the support rail 1 so that it can be moved vertically and fixed.
3. The free end of the adjusting screw 32 is adjustable and lockable in a support 33 arranged on the holder 3. The stamp, designated as a whole by 34, is formed as a nested tube consisting of two inner and outer tubes 35, 36 which are movable within limits. A compression spring 37 is arranged in the inner tube 35, which acts on the inner bottom wall of the outer tube 36 and tends to force the change into the maximum possible extrusion position determined by its end stop. The inner tube 35 is fixed by a screw 38 to a holding part 39 which is connected to the top arm 4.
It has an internal shape that matches the external cross-sectional shape of the top arm, can be iron-fitted to the top arm to adjust its movement in the longitudinal direction, and can be fixed at a desired location with screws 40. The outer tube 36 is stamped or supports a part forming a stamp. The support, designated as a whole by 41, is arranged on a connecting link 42 formed as a square bar connecting the two support rails 13.

As can be seen in particular in FIG. 2, a mounting 43 is mounted on each of the support rails 13, which consists of an upper and a lower part, held together by a screw 44. By tightening this screw 44, a mounting 43 movable on the support rail 13 can be fixed to the rail at the desired location. A part of the fixture 43 is designed as a table 45 that grips the partner thread 12 from below. The table 45 has a notch or hole 46 that matches the cross-sectional shape of the connecting link 42.
and a notch for another set screw 47 perpendicular thereto, with which the connecting link 42 strained into the notch 46 can be firmly tightened. This arrangement makes it possible to firmly connect both support rails 13 to each other at the respective machine pitch spacing. In the illustrated embodiment, the stamp and the support are formed as parts of an interlocking locking joint.

For this purpose, the outer tube 36 has an outer projection into which a stop spring 48 is inserted, which is located on the upwardly directed arrowhead-shaped projection 4 on the part forming the support 41.
It matches the shape of 9. A support 41 with a projection 49 is fixed to the tether link 42 in an adjustable manner by means of a set screw 50. As can be seen in the figure, the protrusion 49 is a vertical web perpendicular to the pivot axes 3 and 15 of the top arm 4 or the support rail 13, and the longitudinally long retaining spring 48 wraps a part of this vertical web in a U-shape from above. Then, the legs of the free plane touch the surface of the web. When the top arm 4 is swung to the non-operating position indicated by the dot-dash line 52 by operating the adjustment lever 51, the support rail 13 is held in place by the locking joint of the bearing 15 unless the support rail is manually stopped and the joint is removed. Participate in this circling motion by circling around.

The lees stopping device is suitable and specified for cooperating with top arms of different constructions and sizes, so that the swivel bearings 15 of the support rails 13 are concentric with each other as shown, but the swivel bearings 15 of the top arm 4 are It may not be the same as 0 for bearing 3.

However, due to the above-described special formation of the stop joints 48 and 49, the slewing bearings 3 and 15 do not have the same D, and the stop spring 48 and the vertical web 49 are not relative to each other even if the top arm and the support rail rotate on different trajectories. Since it slides back and forth (while engaged), it can be rotated together without removing the stop joint.
The support and the stamp are arranged, as shown, in the spacing region between the apron unit of the drafting device and the pair of rollers located in front of it in the direction of travel of the roving.

In this region, in particular when processing short-fiber roving material, isolated fiber tufts occur during the roving stop. in this case,
The tether link not only connects both support rails 13 to each other, but also serves as a support for the fiber tuft, so that the fiber tuft is lowered and
Therefore, it is possible to prevent the lees from being unable to enter the apron unit when restarting the operation. However, the fiber tufts resting on the tether or on the table 45 forming part of this tether are exposed to the air stream if the machine is equipped with a cleaning blower oriented in the area of the drafting device. In order to prevent this air flow from blowing the delicate tufts down from the table, as shown in the figure, the table 45 and the paper thread 12 are covered with the fixture 43, and a holding part is attached so as to be adjustable with respect to the table. It is a good idea to provide This holding part is rotatably mounted on the fixture 43 and has a projecting rotation pin 53 which has a flat surface 54 in the area of the table 45 . The pin 53 includes a gear 55 that meshes with the teeth 28 of the slider 8. The meshing of the teeth is such that a gap 56 is maintained between the table 45 and the flat surface 54 in the driving position, where movement of the roving yarn 12 cannot be spun. During the movement of the slider 18 which causes the roving to stop, the pin 53 is rotated, so that the uneven circumferential surface is directed towards the roving 12, so that the fiber tufts that are generated are attached to the pin 5.
3 and table 45. Attachments include connecting links or holding parts for the table 5
3, it is necessary to insert the roving into the gap 56 between the table 45 and the plane 54 when inserting the roving 12 into the draft device.

Insertion of the roving 12 is carried out by pivoting the top arm 4 upwards, with the support rail 13 in the position shown. In order to facilitate the entry of the roving into this gap, the fixture 43 is formed with a plate-like part 57 which covers the holding part 53 and is provided with a guide ramp 58 that descends towards the free end of the holding part 53, with the slope A support near its free end, together with parts of the stamping device, forms a gateway into the gap 56. bottom roller 5
The roving 12, which extends onto the guide slope 58 when riding linearly on top of the 8, slides down on the guide slope 58 toward the open side of the gap 56, and the roving immediately enters the gap 56. Even if you don't enter,
It is drawn into the gap 56 by being tensioned at the start of operation of the draft device. The tether link 42 included in the supporting and stamping device ensures that the roving 12 enters the gap 56 even when it is next to the gap 56 after sliding off the guide ramp 58.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of an embodiment of the present invention;
FIG. 2 is a sectional view taken along the low D line in FIG. 1. In the figure, 4 is a top arm, 5, 5', 6, 6' are a pair of rollers, 9, 11 are aprons, 12 is a roving, 13 is a support rail, 29 is a stop member, 34 is a stamp, 42
indicates a connecting link. Fig. 'F;9.2

Claims (1)

[Claims] 1. When the yarn breaks, the top roller is moved by the clamping part between the pair of rollers placed in front of the apron unit, and the top roller is removed from the bottom roller, and the roving is firmly held between itself and the top roller. It has a stop part that holds it and stops the advance of the roving.
This stop and its opening/closing device are placed on support rails extending parallel to the roving, and mounted on the machine in such a way that the two support rails assigned to the top arm holding the double top roller can pivot in the same direction as the top arm. In the roving stop device of a certain spinning machine draft device, the support rail 1
A roving of a spinning machine drafting device characterized in that an elastic stamp 34 is provided between a connecting link 42 arranged between 3 and 13 and a top arm 4, and both support rails 13 and 13 receive the load of the top arm 4. Stop device. 2. The roving stopping device according to claim 1, in which an elastic stamp 34 is arranged on the top arm 4 and presses against a support 41 arranged on the tether link 42. 3 The stamp 34 has a nested tube 3 that can be moved with restrictions.
Claim 1: A compression spring 37 is provided in 5, 36.
or 2 roving stop devices. 4. The roving stopping device according to claim 2 or 3, wherein the stamp 34 and the support 41 are parts of a stop joint. 5. Claims 1 to 4: Each support rail 13 has a mounting device 43 for removably fixing the tether link 42.
Any one of the roving stopping devices. 6 The connecting link 42 or its attachment 43 is connected to the roving 1
6. The roving stopping device according to claim 5, further comprising a table 45 for grasping the roving thread 2 from below. 7. The roving stop according to claim 6, wherein the table 45 is provided with a holding part 53 which is attached over the table and the roving 12 and is adjustable within the fixture 43 relative to the table 45. Device.